CVE-2026-10740: Aws s2n-Quic

Medium severity, CVSS 5.3. EPSS: 0.3% chance of exploitation in the next 30 days.

Unbounded memory allocation in the CRYPTO frame reassembler in s2n-quic before 1.8.2 may allow an unauthenticated remote actor to cause a denial of service (degraded availability) by sending crafted QUIC Initial packets. To remediate this issue, users should upgrade to v1.8.2.

Affected products

• Aws s2n-Quic: up to and including 1.8.1

Published 2026-06-10. Last modified 2026-06-17.